I don't think some of you actually ready beyond the list.
1. SNES and GENESIS. SNES was the leader in NA and Japan. The 'Others' market was for Sega. SNES won WW. Supports my hypothesis.
2. PS1 started slow, as did the Gameboy. Why? Becuase this was thier first try at the business. No Sony game machine existed at this time, that is the only why the 3rd time veteran Nintendo64 was leading. So, no the PS1 is not a good example of why the PS3 might come back. All succesor machines, SNES,GBA,PS2, etc started of good and then propelled to greatness.
3. Yes, Xbox did much worse in Japan than GC, yet it beat GC. GC also was significatly behind PS2 in Japan and was last in sales in the other two regions. I am not saying Japan alone is all that is needed. I am saying that domination in Japan will lead to domination in atleast one other region and thus worldwide.
4. Seasonality. I don't think this is a big a factor as you think. The only major console to not have a holiday season in this picture was the Playstation. It was also on the market quite a while before anyone else. Its first holiday sales were not that stellar by comparison to others, again due to the fact it was Sony's first machine and it took awhile to be warmly greeted by the general public.
5. @northstar - Genesis was not in this sites listing for console comparisons. SNES beat the Genesis in NA and Japan and thus Worldwide. Pocketstation was Sony's first attempt at a portable machine. It started out ok due to Sony's by then accepted name in the game world, yet failed overall to even touch the Gameboy Advances marketshare.